SYSTEM AND METHOD FOR WIRELESS POWER CONTROL COMMUNICATION USING BLUETOOTH LOW ENERGY

专利摘要:
system and method for wireless power control communication using bluetooth low energy this disclosure presents systems, methods and equipment for connecting to a charging apparatus via a wireless communications network. in one aspect, a wireless charger comprises a transmitter configured to transmit an energy signal. the charger without also comprises a device scanner configured to scan for one or requests transmitted by devices. the wireless charger also comprises a receiver configured to receive a connection request via the wireless communications network from the charging apparatus in response to the transmitted power signal. the transmitter may be configured to transmit a connection request to establish a connection with the charging apparatus in response to the received connection request.
公开号:BR112014024783B1
申请号:R112014024783-8
申请日:2013-03-26
公开日:2021-07-20
发明作者:Brian A. Redding
申请人:Qualcomm Incorporated；
IPC主号:

专利说明:

FIELD
[0001] The present invention relates generally to wireless power. More specifically, the disclosure refers to establishing a connection between a wireless charging and charging apparatus using Bluetooth Low Energy. BACKGROUND
[0002] An increasing number and variety of electronic devices are powered by rechargeable batteries. Such devices include mobile phones, portable music players, lap-top computers, tablet computers, computer peripheral devices, communication devices (Bluetooth devices, for example), digital cameras, listening devices and the like. While battery technology has been improved, battery powered electronics require and consume ever-increasing amounts of energy, thus often requiring recharging. Rechargeable devices are often recharged through wired connections through cables or other similar connectors that are physically connected to a power source. Cables and similar connectors can sometimes be inconvenient or cumbersome and have other disadvantages. Wireless charging systems that are capable of transferring energy into free space to be used to charge rechargeable electronics or powering electronics can overcome some of the shortcomings of wired charging solutions. Therefore, wireless power transfer systems and methods that efficiently and safely transfer power to electronic devices are desirable. SUMMARY
[0003] Various implementations of systems, methods and apparatus within the scope of the appended claims each have several aspects, not one of which is solely responsible for the desirable attributes described herein. Without limiting the scope of the appended claims, some prominent features are described herein.
[0004] Details of one or more implementations of the object described in this report are presented in the attached drawings and in the description that follows. other features, features and advantages will become evident from the description, drawings and claims. Note that the relative dimensions of the following figures may not be drawn to scale.
[0005] One aspect of the disclosure provides a wireless charger for connection to charging apparatus via a wireless communications network. The wireless charger comprises a transmitter configured to transmit an energy signal. The wireless charger also comprises a device scanner configured to scan for one or more connection requests transmitted by the device. The wireless charger also comprises a receiver configured to receive a connection request via the wireless communications network from the charging apparatus in response to the transmitted power signal. The transmitter may be configured to transmit a connection request to establish a connection with the charging apparatus in response to the received connection request.
[0006] Another aspect of the disclosure provides a method for connecting to a charging apparatus wirelessly via a wireless communications network. The method comprises transmitting an energy signal. The method also comprises scanning for one or more connection requests transmitted by devices. The method further comprises receiving a connection request, via the wireless communications network, from the charging apparatus in response to the transmitted power signal. The method further comprises transmitting a connection request to establish a connection with the charging apparatus in response to the received connection request.
[0007] Another aspect of the disclosure provides equipment for connecting to a charging apparatus via a wireless communications network. The equipment comprises a device for transmitting an energy signal. The equipment also comprises a device to scan for one or more connection requests transmitted by devices. The method further comprises receiving a connection request, via the wireless communications network, from the charging apparatus in response to the transmitted power signal. The equipment also comprises a device for receiving a connection request via the wireless communications network of the charging apparatus in response to the transmitted power signal. The equipment also comprises a device for transmitting a connection request to establish a connection with the charging apparatus in response to the received connection request.
[0008] Another aspect of the disclosure provides a non-transient computer readable medium that comprises a code that when executed, causes a device to transmit an energy signal. The medium also comprises a code that, when executed, causes the equipment to scan in search of one or more connection requests transmitted by the device. The medium also comprises a code which when executed causes an equipment to receive a connection request via a wireless communications network of the charging apparatus in response to the transmitted power signal. The medium also comprises a code which, when executed, causes an equipment to transmit a connection request to establish a connection with the charging apparatus in response to the received connection request.
[0009] Another aspect of the disclosure provides a charging apparatus for connecting to a wireless charger via a wireless communications network. The charging apparatus comprises a receiver configured to receive a power signal transmitted by the wireless charger. The charging apparatus also comprises a processor configured to generate a connection request in response to the power signal being received. The charging apparatus also comprises a transmitter configured to transmit the connection request via the wireless communications network. The receiver can be configured to receive a connection request to establish a connection with the wireless network entity charger to the transmitted connection request.
[0010] Another aspect of the disclosure provides a method for connecting to a wireless charger via a wireless communications network. The method comprises receiving a power signal transmitted by the wireless charger. The method also comprises generating a connection request in response to the power signal that is received. The method also comprises transmitting the connection request via the wireless communications network. The method further comprises receiving a connection request to establish a connection with the wireless charger in response to the transmitted connection request.
[0011] Another aspect of the disclosure provides equipment for connecting to a wireless charger via a wireless communications network. The equipment comprises a device for receiving a power signal transmitted by the wireless charger. The equipment also comprises a device for generating a connection request in response to the power signal being received. The equipment also comprises a device for transmitting the connection request through the wireless communications network. The equipment also comprises a device for receiving a connection request to establish a connection with the wireless charger in response to the transmitted connection request.
[0012] Another aspect of the disclosure provides a non-transient computer readable medium comprising a code that, when executed, causes a device to receive a power signal transmitted by the wireless charger. The medium also comprises a code that, when executed, causes an equipment to generate a connection request in response to the power signal that is received. The medium also comprises a code that, when executed, causes an equipment to transmit the connection request through a wireless communications network. The medium also comprises a code that when executed causes an equipment to receive a connection request to establish a connection with the wireless charger in response to the transmitted connection request. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a functional block diagram of an exemplary wireless power transfer system, in accordance with exemplary embodiments.
[0014] Figure 2 is a functional block diagram of exemplary components that can be used in the wireless power transfer system of Figure 1, according to several exemplary embodiments.
[0015] Figure 3 is a schematic diagram of a portion of a transmit circuitry or receive circuitry of Figure 2 that includes a transmit or receive coil, in accordance with exemplary embodiments.
[0016] Figure 4 is a functional block diagram of a transmitter that can be used in the wireless power transfer system of Figure 1, according to exemplary embodiments.
[0017] Figure 5 is a functional block diagram of a receiver that can be used in the wireless power transfer system of Figure 1, according to exemplary embodiments.
[0018] Figure 6 is a schematic diagram of a portion of the transmission circuitry that can be used in the transmission circuitry of Figure 4.
[0019] Figure 7 is a block diagram of a Wireless Charging Systems that may incorporate the transmit circuitry of Figure 4 and the receive circuitry of Figure 5.
[0020] Figure 8A is a block diagram of a service and charging profile for a wireless charging system, such as the Wireless Charging Systems of Figure 7.
[0021] Figure 8B is another block diagram of a service and charging profile for a Wireless Charging Systems, such as the Wireless Charging Systems of Figure 7.
[0022] Figure 9 is a timing diagram of communications between a wireless charger and a charging apparatus, such as the wireless charger and charging apparatus of Figure 7, to establish a connection between the wireless charger and the charging device.
[0023] Figure 10 is a timing diagram of communications between a wireless charger and a charging apparatus, such as the wireless charger and charging apparatus of Figure 7, during a first connection.
[0024] Figure 11 is a timing diagram of communications between a wireless charger and a charging apparatus, such as the wireless charger and charging apparatus of Figure 7.
[0025] Figure 12 is another timing diagram of communications between a wireless charger and a charging apparatus, such as the wireless charger and charging apparatus of Figure 7.
[0026] Figure 13 is a flowchart of an exemplary method for wirelessly connecting to a charging apparatus via a wireless communications network.
[0027] Figure 14 is a functional block diagram of a wireless charger, according to an exemplary embodiment.
[0028] Figure 15 is a flowchart of an exemplary method for connecting to a wireless charger via a wireless communications network.
[0029] Figure 16 is a functional block diagram of a charging apparatus, according to an exemplary embodiment.
[0030] The various features shown in the drawings may not be drawn to scale. Therefore, the dimensions of the various features can be arbitrarily expanded or reduced for clarity. Also, some of the drawings may not show all components of a given system, method or apparatus. Finally, the same reference numbers can be used to denote the same features throughout the report and figures. DETAILED DESCRIPTION
[0031] The detailed description given below in connection with the accompanying drawings is intended to be a description of exemplary embodiments and is not intended to represent the only embodiments in which the invention may be practiced. The term "exemplary" used throughout this description means "which serves as an example, occurrence or illustration" and is not necessarily to be interpreted as preferred or advantageous compared to other exemplary embodiments. The detailed description includes specific details for the purpose of obtaining a complete understanding of the exemplary modalities. In some cases, some devices are shown in block diagram form.
[0032] Wireless transfer of energy can refer to the transfer of any form of energy associated with electric fields, magnetic fields, electromagnetic fields or others from a transmitter to a receiver without the use of physical electrical conductors (the energy can be transferred via free space, for example). The output of energy into a wireless field (a magnetic field, for example) can be received, captured or coupled by a “receiving coil” in order to obtain energy transfer.
[0033] Figure 1 is a functional block diagram of an exemplary wireless power transfer system 100, in accordance with exemplary embodiments. Input power 102 can be supplied to a transmitter 104 from a power source (not shown) to generate a field 105 to provide power transfer. A receiver 108 can couple to field 105 and generate output power 110 for storage or consumption by an apparatus (not shown) coupled to output power 110. Both transmitter 104 and receiver 108 are separated by a distance 112. in an exemplary embodiment, transmitter 104 and receiver 108 are configured in accordance with a mutual resonance relationship. When the resonant frequency of the receiver 108 and the resonant frequency of the transmitter 104 are substantially the same or very close, the transmission losses between the transmitter 104 and the receiver 108 are minimal. As such, wireless power transfer can be done over a longer distance in contrast to purely inductive solutions that may require large coils that require the coils to be very close together (mms, for example). Resonance inductive coupling techniques can thus provide improved efficiency and energy transfer over various distances and with various inductor coil configurations.
[0034] The receiver 108 can receive energy when the receiver 108 is located in an energy field 105 produced by the transmitter 104. The field 105 corresponds to a region in which the energy transmitted by the transmitter 104 can be captured by a receiver 108. In in some cases, field 105 may correspond to the “near field” of transmitter 104, as will also be described below. Transmitter 104 may include a transmit coil for transmitting a transmission of energy. Receiver 108 also includes a receive coil 118 for receiving or capturing power from the power transmission. The near field may correspond to a region in which there are resistant reactive fields resulting from currents and charges in transmission coil 114 that radiate minimal energy away from transmission coil 114. In some cases, the near field may correspond to a region that is within about one wavelength (or a fraction thereof) of transmit coil 114. Transmitter and receive coils 114 and 118 are sized according to the applications and apparatus to be associated with them. As described above, an effective energy transfer can occur by coupling a large part of the energy in a field 105 of the transmit coil 114 to a coil of receive coil 118, rather than by propagating most of the energy in an electromagnetic wave. to the far field. When positioned within field 105, a "coupling mode" can be developed between transmit coil 114 and receive coil 118. The area around transmit and receive coils 114 and 118 where this coupling can occur is here referred to as the coupling mode region.
[0035] Figure 2 is a functional block diagram of exemplary components that can be used in the energy transfer system 100 of Figure 1, according to several exemplary embodiments. Transmitter 204 may include transmission circuitry 206 which may include an oscillator 222, a driver circuit 224, and a filter and match circuit 226. Oscillator 222 may be configured to generate a signal at the desired frequency, such as 468 .75 KHz, 0.70 MHz or 13.56 MHz which can be adjusted in response to a frequency control signal 323. The oscillator signal can be sent to a driver circuit 224 configured to drive the transmit coil 214 a for example, a resonant frequency of the transmit coil 214. The driver circuit 224 may be a switching amplifier configured to receive a square wave from oscillator 222 and transmit a sine wave. For example, the driver circuit 224 may be a class E amplifier. A filter and match circuit 226 may also be included to filter out harmonics or other unwanted frequencies and match the impedance of the transmitter 204 with that of the transmit coil 214 .
[0036] Receiver 208 may include a receiving circuitry 210, which may include a matching circuit 232 and a rectifier and switching circuit 234 to generate a DC power output from an AC power input to charge a battery 236 , as shown in Figure 2 or to connect an apparatus (not shown) coupled to receiver 108. Matching circuitry 232 may be included to match the impedance of receive circuitry 210 to that of receive coil 219. and the transmitter 204 can additionally communicate on a separate communication channel 219 (such as Bluetooth zigbee, cellular, etc.). Receiver 208 and transmitter 204 may alternatively communicate via inband signaling using features of wireless field 206.
[0037] As described more fully below, receiver 208, which may initially have a selectively disabling load attached (battery 236, for example) can be configured to determine whether the amount of power transmitted by transmitter 204 is received by receiver 208 it is suitable for charging a battery 236. In addition, the receiver 208 can be configured to enable a charge (battery 236, for example) by determining that the amount of energy is appropriate. In some embodiments, a receiver 208 may be configured to directly utilize energy received from a wireless energy transfer field without charging a battery 236. For example, a communication apparatus such as a near-field communication apparatus (NFC) or radio frequency identification (RFID) can be configured to network receive energy from a wireless energy transfer field and communicate by interacting with the wireless energy transfer field and/or using the received energy to communicate with a 204 transmitter or other devices.
[0038] Figure 3 is a schematic diagram of a portion of the transmit circuitry 206 or the receive circuitry 210 of Figure 2, which includes a transmit or receive coil 352, according to exemplary embodiments. As shown in Figure 3, the transmit or receive circuitry 350 used in exemplary embodiments may include a coil 352. The coil may also be referred to or be configured as a "mesh" antenna 352. The coil 352 may also be referred to herein. referred to or configured as a “magnetic” antenna or an induction coil. The term "coil" is intended to refer to a component that can wirelessly transmit or receive energy to couple with another "coil". The coil may also be referred to as an “antenna” of a type that is configured to wirelessly transmit or receive energy. Coil 352 can be configured to include an aerial core or a physical core such as a ferrite core (not shown). Overhead core mesh coils may be more tolerable with external physical apparatus placed in the vicinity of the core. In addition, an aerial core 352 mesh coil allows placement of other components within the core area. In addition, an aerial core mesh may more readily allow placement of receive coil 218 (Figure 2) within a plane of transmission coil 214 (Figure 2) where the coupled mode region of transmission coil 214 (Figure 2) ) may be more powerful.
[0039] As stated, an efficient transfer of energy between the transmitter 104 and the receiver 108 can occur during the matched or nearly matched resonance between the transmitter 104 and the receiver 108. However, even when the resonances between the transmitter 104 and the receiver 108 are unmarried, energy can be transferred although effectiveness may be affected. The transfer of energy takes place by coupling the energy of the field 105 of the transmit coil with the receive coil which resides in the vicinity where this field 105 is established and not by propagating the energy from the transmit coil into the free space.
[0040] The resonant frequency of mesh or magnetic coils is based on inductance and capacitance. The inductance can simply be the inductance produced by the coil 352, while the capacitance can be added to the inductance of the coil to produce a resonant structure at the desired resonant frequency. As a non-limiting example, capacitor 352 and capacitor 354 can be added to transmit or receive circuitry 350 to create a resonant circuit that selects a signal 356 at a resonant frequency. Therefore, for larger diameter coils, the size of capacitance required to sustain resonance may decrease as the mesh diameter or inductance increases. Also, as the coil diameter increases, the effective near-field energy transfer area may increase. Other resonance circuits formed using other components are also possible. As another non-limiting example, a capacitor can be placed in parallel between the two terminals of coil 350. For transmit coil, a signal 358 with a frequency substantially corresponding to the resonant frequency of coil 352 can be an input to coil 352 .
[0041] In one embodiment, the transmitter 104 can be configured to transmit a time-varying magnetic field with a frequency that corresponds to the resonant frequency of the transmission coil 114. When the receiver is within field 105, the magnetic field varies in time it can induce a current in the receive coil 118. As described above, if the receive coil 118 is configured to be resonant with the frequency of the transmit coil 118, energy can be effectively transferred. The AC signal induced in the receive coil 118 can be rectified, as described above, to produce a DC signal that can be generated to charge or to turn on a load.
[0042] Figure 4 is a functional block diagram of a transmitter 404 that can be used in the wireless power transfer system of Figure 1, according to exemplary embodiments. Transmitter 404 may include a transmit circuitry 406 and a transmit coil 414. Transmit coil 414 may be coil 352 shown in Figure 3. Transmit circuitry 406 may supply RF energy to transmit coil 414 generating an oscillating signal that results in the generation of energy (magnetic flux, for example) around the transmission coil 414. The transmitter 404 can operate at any suitable frequency. By way of example, transmitter 404 can operate in the 13.56 MHz ISM band.
[0043] The transmission circuitry 406 may include a fixed impedance matching circuit 409 to match the impedance of the transmission circuitry 406 (50ohms, for example) with that of the transmission coil 414 and a low pass filter (LPF) 408 configured to reduce harmonic emissions to levels that avoid high jamming of devices coupled to the 108 receivers (Figure 1). Other exemplary modalities may include different filter topologies, which include, but are not limited to, notch filters that attenuate specific frequencies while passing others, and may include adaptive impedance matching, which may vary based on metrics. measurable transmissions, such as the output power to the coil 414 or the DC current drawn by the driver circuit 424. The transmission circuitry 406 also includes a driver circuit 424 configured to drive an RF signal determined by an oscillator 423. The transmission circuitry 406 can be made up of discrete devices or circuits or, alternatively, it can be made up of an integrated array. An exemplary RF power output from transmit coil 414 can be on the order of 2.5 watts.
[0044] The transmission circuitry 406 may also include a controller 415 to selectively enable the oscillator 423 during transmission phases (or operating cycles) to specific receivers, to adjust the frequency or phase of the oscillator 423 and adjust the level of output power to implement a communication protocol for interacting with neighboring devices through their attached receivers. It is noted that controller 415 may also be referred to herein as processor 415. Adjusting the phase of the oscillator and associated circuitry in the transmission path can provide for the reduction of out-of-band emissions, especially when transitioning from one frequency to the next. other.
[0045] The transmission circuitry 406 may also include a load detection circuit 416 for detecting the presence or absence of active receivers in the vicinity of the near field generated by the transmission coil 414. By way of example, a detection circuit load 416 monitors the current flowing to the driver circuit 424, which may be affected by the presence or absence of active receivers in the vicinity of the field generated by drive coil 414, as will also be described below. Detection of load changes in the driver circuit 424 is monitored by controller 415 for use in determining whether to enable oscillator 423 for power transmission and for communicating with an active receiver. As described more fully below, the current measured in driver circuit 424 can be used to determine if an invalid device is positioned within a wireless power transfer region of transmitter 404.
[0046] Transmission coil 414 can be implemented with a Litz wire or as an antenna strip with selected thickness, width and metal type to keep resistive losses low. In one implementation, the drive coil can generally be configured for association with a larger structure, such as a table, rug, lamp, or other less portable configuration. therefore, drive coil 414 generally may not require "turns" to be of practical size. An exemplary implementation of a transmit coil 414 can be "electrically small" (i.e., a fraction of the wavelength) and tuned to resonate at lower frequencies by using capacitors to set the resonant frequency.
[0047] Transmitter 404 may gather and track information about the location and condition of receiving apparatus that may be associated with transmitter 404. Thus, transmission circuitry 406 may include a presence detector 480, a closed detector 460, or a combination of them connected to controller 415 (also referred to herein as processor). Controller 415 can adjust the amount of power delivered by driver circuit 424 in response to presence signals from presence detector 480 and lock detector 460. Transmitter 404 can receive power from various power sources, such as by example, an AC-DC converter (not shown) to convert conventional AC power present in a building, a DC-DC converter (not shown) to convert a conventional DC power supply to a voltage suitable for the 404 transmitter, or directly from a conventional DC power supply (not shown).
[0048] As a non-limiting example, the presence detector 480 may be a motion detector used to detect the initial presence of an apparatus to be carried that is inserted into the coverage area of the 404 transmitter. Upon detection, the 404 transmitter may is turned on and the RF energy received by the device can be used to switch the Rx device on in a predetermined manner, which in turn results in changes in the impedance of trigger points of the transmitter 404.
[0049] As another non-limiting example, the presence detector 480 may be a detector capable of detecting a human being, such as by infrared detection, motion detection or other suitable device. In some exemplary embodiments, there may be settings that limit the amount of energy that transmit coil 414 can transmit at a specific frequency. In some cases, these regulations are intended to protect humans from electromagnetic radiation. However, there may be environments where a transmission coil 414 is placed in areas not occupied by humans or infrequently occupied by humans, such as, for example, garages, factory floors, shops, and the like. If these environments are free of humans, it may be permissible to increase the power output of transmission coil 414 above normal power restriction settings. In other words, the controller 415 can adjust the power signal of the transmit coil 414 to a regulation level or lower in response to human presence and adjust the power output of the transmit coil 414 to a level above the regulating level when a human being is outside the regulating distance of the electromagnetic field from the transmission coil 414.
[0050] As a non-limiting example, closed detector 460 (may also be referred to herein as closed compartment detector or closed space detector) may be an apparatus such as a detection switch to determine when an enclosure is in a closed state. or open. When the transmitter is in an enclosure that is in a closed state, the transmitter's power level can be increased.
[0051] In exemplary embodiments, a method may be used whereby the transmitter 404 does not remain on indefinitely. In this case the 404 transmitter can be programmed to turn off after a user-specified amount of time. This feature prevents the 404 transmitter, notably the 404 trigger circuit, from working long after the wireless devices are fully charged. This event could be due to the circuit's failure to detect the sent signal or the repeater or receive coil that the device is fully charged. to prevent the 404 transmitter from automatically turning off if another device is placed within its perimeter, the 404 transmitter's auto power off feature can only be activated after a fixed period of no motion detected at its perimeter. The user may be able to determine the downtime range and change it as desired. As a non-limiting example, the time interval may be longer than necessary to fully charge a specific type of wireless device under the assumption that the device is initially fully discharged.
[0052] Figure 5 is a functional block diagram of a receiver 508 that can be used in the wireless power transfer system of Figure 1 according to exemplary embodiments. Receiver 508 includes receive circuitry 510 that may include a receive coil 518. Receiver 508 also couples with apparatus 550 to supply received power thereto. It should be noted that receiver 508 is shown to be external to apparatus 550, but may be integrated into apparatus 550. Power can be wirelessly propagated to receive coil 518 and then coupled through the remainder of the receive circuitry 510 to apparatus 550. By way of example, the charging apparatus may include apparatus such as mobile phones, portable music players, laptop computers, tablet computers, computer peripheral apparatus, communication apparatus (bluetooth apparatus, for example) digital cameras , hearing devices, medical devices and the like.
[0053] Receive coil 518 can be tuned to resonate at the same frequency, or within a specified range of frequencies, as transmit coil 414 (Figure 4). Receive coil 518 may be similarly sized with transmit coil 414 or may be differently sized based on the dimensions of the connected apparatus 550. By way of example, apparatus 550 may be a portable electronic apparatus that has a diametrical dimension or a length less than the length diameter of the transmission coil 414. In such an example, the receive coil 518 may be implemented as a transmission coil. several turns in order to reduce the capacitance value of a tuning capacitor (not shown) and increase the impedance of the receive coil. By way of example, the take-up coil 518 may be placed around the substantial circumference of the apparatus 550 so as to maximize the coil diameter and reduce the number of circuit turns (i.e., windings) of the coil. reception 518 and the interwinding capacitance.
[0054] Receive circuitry 510 for providing an impedance match for receive coil 518. Receive circuitry 510 includes energy conversion circuitry 506 for converting a source of received RF energy to energy charger for use by apparatus 550. Energy conversion circuitry 506 includes an RF-DC converter 520 and may also include a DCDC converter 522. RF-DC converter 520 rectifies the RF energy signal received in the coil. 518 reception on a non-alternating power with an output voltage represented by Vrect. The DC-DC converter 522 (or other energy regulator) converts the rectified RF energy signal into an energy potential (voltage, for example) that is compatible with the apparatus 550 with an output voltage and an output current represented by VOUT and IOUT. Various RF-DC converters are contemplated, including partial and complete rectifiers, regulators, bridges, duplicators as well as linear and switching converters.
[0055] The receive circuitry 510 may also include a switching circuitry 512 to connect the receive coil 518 to the energy conversion circuitry 506 or, alternatively, to disconnect the energy conversion circuitry 506. Disconnecting the receive coil 518 from the energy conversion circuitry 506 not only suspends charging from the apparatus 550, but also charges the “load” “seen” by the transmitter 404 (Figure 2).
[0056] As disclosed above, the transmitter 404 includes a load sensing circuit 416 that can detect fluctuations in the bias current sent to the transmitter driver circuit 424. Therefore, transmitter 404 has a mechanism for determining when receivers are present in the transmitter's near field.
[0057] When multiple receivers 508 are present in the near field of a transmitter, it is desirable to time multiplex the loading and unloading of one or more receivers in order to allow other receivers to more effectively couple to the transmitter. A receiver 508 may also be hidden to eliminate coupling with other nearby receivers or to reduce loading on nearby transmitters. This “downloading” from a receiver is also known here as “blinding”. Furthermore, this switching between offloading and loading, controlled by receiver 508 and detected by transmitter 404, can provide a communication mechanism from receiver 508 to transmitter 404, as explained more fully below. Furthermore, a protocol can be associated to the switching that allows the sending of a message from the receiver 508 to the transmitter 404. By way of example, the switching speed can be in the order of 100µsec.
[0058] In an exemplary modality, the communication between the transmitter 404 and the receiver 508 refers to the sending and loading by a device, of a control mechanism and not to conventional bidirectional communication (i.e., signaling in the band that uses the coupling field). In other words, the transmitter 404 can use on/off switching of the transmitted signal to adjust whether power is available in the near field. The receiver can interpret these changes in energy as a message from the transmitter 404. On the receiver side, the receiver 508 can use the tuning and detuning of the receive coil 518 to adjust the way in which much of the energy is being accepted from the field. In some cases, tuning and detuning can be accomplished through switching circuitry 512. Transmitter 404 can detect this difference in energy used from the field and interpret these changes as a message from receiver 508. that other forms of modulation of transmission power and load behavior can be used.
[0059] The receiving circuitry 510 may also include a signaling detector and an indication circuitry used to identify received power fluctuations, which may correspond to informational signaling from the transmitter to the receiver. In addition, the signaling and indicating circuitry 514 may also be used to detect the transmission of a reduced RF signal energy (i.e., an indication signal) and to rectify the reduced RF signal energy to a nominal power for awakening either unconnected or depleted circuitry within the receiving circuitry 510 so as to configure the receiving circuitry 510 for wireless charging.
[0060] Receiver circuitry 510 also includes a processor 516 for coordinating the processes of receiver 508 described herein which include control of switching circuitry 512 described herein. Blinding of the 508 receiver can also occur when other events occur, including the detection of an external wired charging source (wall/USB power, for example) that supplies charging power to the 550 device. The 516 processor, in addition of controlling receiver concealment, it may also monitor the indication circuitry 551 so as to determine the indication status and extract messages sent from the transmitter 404. The processor 516 may also adjust the DC-DC converter 522 for improved performance.
[0061] Figure 6 is a schematic diagram of a portion of the transmission circuitry that may be used in the transmission circuitry 406 of Figure 4. The transmission circuitry 600 may include a driver circuit 624 as described. above in Figure 4. As described above, the driver circuit 624 can be a switching amplifier that can be configured to receive a square wave and transmit a sine wave to be sent to the return transport channel 650. driver circuit 624 may be referred to as amplifier circuit. Trigger circuit 624 is shown as a Class E amplifier, but any suitable trigger circuit 624 can be used according to the modalities. The driver circuit 624. The driver circuit 624 can be driven by an input signal 602 from an oscillator 423 as shown in Figure 4. The driver circuit 624 can also be provided with a drive voltage VD that is configured to control the maximum power that can be distributed through a transmission circuit channel 650. To eliminate or reduce harmonics, the transmission circuitry may include a filter circuit 626. The filter circuit 626 may include a low pass filter circuit three poles (capacitor 634, inductor 632 and capacitor 636) 626.
[0062] The signal transmitted by filter circuit 626 may be sent to transmission circuit 650 comprising a coil 614. Transmission circuit 650 may include a series resonance circuit having a capacitance 620 and an inductance (which may be decide on the inductance or capacitance of the coil or an additional capacitor component, for example) that can resonate to the frequency of the filtered signal provided by the driver circuit 624. The load of the transmission circuit 650 can be represented by the variable resistor 622. may be a function of a wireless power receiver 508 that is positioned to receive power from the transmission circuit 650.
[0063] Figure 7 is a block diagram of a wireless charging system 700 that may incorporate the transmit circuitry 406 of Figure 4 and the receive circuitry 510 of Figure 5. The wireless charging system 700 may comprise a wireless charger 702 and a charging apparatus 704. The wireless charger 702 may include a wireless power transmitter 710 and a Bluetooth transceiver 720. In one embodiment, the wireless power transmitter 710 may be similar to and/or include the same functionality as transmit circuitry 406 of Figure 4. Charging apparatus 704 may be similar to charging apparatus 550 of Figure 5 and also include a wireless power receiver 715 and a Bluetooth transceiver 725. In one embodiment, wireless power receiver 715 may be similar to and/or include the same functionality as receiver circuitry 510 of Figure 5.
[0064] The wireless power transmitter 710 can be coupled to a transmit coil 714. The transmit coil 714 can be similar to the transmit coil 414 of Figure 4. Likewise, the wireless power receiver 715 can be coupled to a take-up coil 718. The take-up coil 718 may be similar to the take-up coil 518 of Figure 5. In one embodiment the wireless power transmitter 710 can be configured to wirelessly transmit power to the wireless power receiver 715 in order to charge the charging apparatus 704.
[0065] Bluetooth transceiver 720 can be coupled to Bluetooth antenna 724 and Bluetooth transceiver 725 can be coupled to Bluetooth antenna 728. In one embodiment, Bluetooth transceivers 720 and 725, through antennas 724 and 728, can be used to establishing a connection between the wireless charger 702 and the charging apparatus 704 so that the charging apparatus 704 can receive wireless power from the wireless charger 702 in order to charge its battery or similar apparatus. Note that while the use of the Bluetooth protocol to establish a connection between wireless charger 702 and charging device 704 is described here, it is not intended to be limiting. Aspects of the disclosure described herein can be implemented using any wireless communication protocol (such as, for example, a proprietary communication protocol, a communication protocol established by a standards organization such as the IEEE, etc. For example, they can IrDA, Wireless USB, Z-Wave, ZigBee, USB, FireWire, and/or similar may be used.
[0066] Figure 8A is a block diagram of a service and charging profile 800 for a wireless charging system, such as the wireless charging system 700n of Figure 7. In one embodiment, the service and charging profile 800 comprises a wireless charger 802 and a charging apparatus 804. The wireless charger 802 may be similar to the wireless charger 702 of Figure 7 and the charging apparatus 804 may be similar to the charging apparatus 704 of Figure 7. The charger wireless 802 can include an 810 processor, which is configured to trigger an 815 load profile. In some respects, the 815 load profile is a generic attribute profile (GATT) client that uses Bluetooth Low Power transport (BLE). ), where the GATT establishes common operations and a structure for the data transported and stored by an attribute protocol. In general, GATT is used for discovery services.
[0067] The charging apparatus 804 can operate in two modes: an auto-connect mode and a charger connected mode. In auto-on mode, the 804 charging device contains enough energy (such as enough energy that remains in its battery or other internal power source) to function in a normal mode while charging. In charger powered mode, the 804 charging device does not have enough power to operate in normal mode and requires power from the 802 wireless charger to power up in order to support a charging operation.
[0068] The upload apparatus 804 may include a processor 820, which is configured to drive a upload service 825. In some respects, the upload service 825 is a GATT server using transport (BLE) where a GATT server stores the data transported through the protocol attributes and requests, commands and protocol acknowledgments of GATT client access attributes. In one embodiment, the charging service 825 may interact with the charging profile 815 when the charging apparatus 804 is operating in auto-on mode. For example, the 804 charging device in auto-on mode may have enough charge remaining in its battery so that a device such as the 820 processor, which can use more power than other components such as a chip set, can be turned on. In other embodiments, charging service 825 may interact with charging profile 815 when charging apparatus 804 is operating in charger connected mode.
[0069] The upload apparatus 804 may also include a chip set, such as a Bluetooth chip set 830, which is configured to trigger a upload service 835. In some respects, the upload service is a GATT server. In one embodiment, the charging service 835 may interact with the charging profile 815 when the charging apparatus 804 is operating in charger powered mode. For example, charging device 804 in charger powered mode may not have enough charge to power all components, such as the 820 processor. Bluetooth 830 chips can be connected. In other embodiments, the charging service 835 may interact with the charging profile 815 when the charging apparatus 804 is operating in auto-on mode. In other words, the charging apparatus 804 may include at least two GSTT servers, each implementing a different 825 or 835 charging service, and each server may include an instance of a WiPower charging service (WPCS) and an instance of a device information service (DIS).
[0070] Although Figure 8A shows the 830 chipset as being a Bluetooth chipset, it should be noted that this is not intended to be limiting and the 830 chipset can be designed to handle any wireless communication protocol. In still other embodiments, the charging service 825 and/or 835 may be embodied in an accessory of the charging apparatus 804, such as an external apparatus or a liner.
[0071] Figure 8B is another block diagram of a service and charging profile 850 for a wireless charging system, such as the wireless charging system 700 of Figure 7. In one embodiment, the charging apparatus 804 may include a chip set, such as the Bluetooth chip set 830, which is configured to trigger the 825 and 835 charging services. The 825 charging service can be used to interact with the 815 charging profile when the charging device 804 is in auto-connect mode and the 835 charging service can be used to interface with the 815 charging profile when the 804 charging device is in charger connected mode. Alternatively, the charging service 825 can be used to interact with the charging profile 815 when the charging apparatus 804 is in charger connected mode and/or charging service 835 can be used to interact with the charging profile 815 when the 804 charging device is in auto-on mode. In other embodiments, a processor, such as processor 820 of Figure 8A, may be configured to drive the upload services 825 and 835. In other words, the upload apparatus 804 may include a GATT server that implements at least two services of load 825 or 835 different ones, and the GATT server can include an instance of a WPCS and an instance of a DIS.
[0072] Figure 9 is a timing diagram of communications between a wireless charger and a charging apparatus, such as wireless charger 702 and charging apparatus 704, to establish a connection between the wireless charger and the charging apparatus. loading. Wireless charger 702 can transmit an energy pulse 902, where energy pulse 902 can be used to supply power to a charging apparatus, such as charging apparatus 704, to charge the charging apparatus. Wireless charger 702 can transmit pulse of energy 902 in order to detect a charging apparatus. As shown in Figure 9, energy pulse 902 was transmitted, but no charging devices were in range of pulse energy 902. Wireless charger 702 can wait a period of time before transmitting another pulse of 904 energy. For example , the 702 wireless charger can wait for 11.25 msec or 22.5 msec. When transmitting power pulse 902 and/or 904, wireless charger 702 can initiate a general connection establishment procedure. As shown in Figure 9, energy pulse 904 was transmitted and was in range of charging apparatus 704.
[0073] In some embodiments, wireless charger 702 begins scanning and scanning for advertisements (a connection request or a device feature notice, for example) from a device such as charging device 704. other modalities, once wireless charger 702 detects a charge on pulse power 904, wireless charger 702 begins scanning for advertisements (a connection request or device feature notice, for example) of a device such as a charging device 704. In this way, the wireless charger 702 can conserve energy only by scanning for advertisements once it detects a charge in a pulse of energy. In one embodiment, the energy pulse 904 causes the charging apparatus 704 to generate an advertisement (a processor of the charging apparatus 704 may generate the announcement, for example). The advertisement may include the address of the target device and the type of upload service. As an example, the advertisement may be a BLE advertisement 906. The charging apparatus 704 may transmit the advertisement BLE 906 (as a broadcast message, for example) with the wireless charger 702 as the intended recipient. If the BLE 906 announcement does not reach the wireless charger 702 (as shown in Figure 9) then the charging apparatus 704 can generate and transmit another BLE 908 announcement. For example, the charging apparatus 704 may wait 20msec before sending another announcement BLE 908. If a connection is not established within a certain time frame, such as 10 seconds, the charging apparatus 704 may exit the connectable mode and stop any charging that may have started. In this way, charging apparatus 704 can conserve energy by only generating and transmitting a BLE 906 and/or 908 announcement once it receives a pulse of energy 902 and/or 904 from wireless charger 702.
[0074] Once the wireless charger 702 receives the DLE 908 announcement, the wireless charger 702 can transmit a connection request 912 to the charging apparatus 704. If the charging apparatus 704 accepts the connection request 912, then a connection 914 is established between the wireless charger 702 and the charging apparatus 704. In some embodiments, once the wireless charger 702 receives the BLE 908 announcement, the wireless charger 702 may continue to transmit the energy pulse 902 and /or 904 until connection 914 is established between wireless charger 702 and charging device 704.
[0075] Note that during the connection process shown in Figure 9, the wireless charger 702 may continue to transmit power 910, such as through the power pulse 902 and/or 904, in order to charge the device charging device 704. In some respects, the charging device 704 may be in charger powered mode, and the power 910 would allow the charging device to remain active in order to establish a connection with the wireless charger 702. Since it is a charger wireless 702 determines that a connection cannot be established, that the charging apparatus 704 is now in auto-on mode, and/or that the charging apparatus 704 does not otherwise need the transmitted power of the wireless charger 702, then 702 wireless charger can interrupt 910 power transmission.
[0076] If a connection is lost at any point, charging apparatus 704 may attempt to reconnect with wireless charger 702. Alternatively, charging apparatus 704 may wait until it receives another pulse of 902 and/or 904 energy from the wireless charger 702.
[0077] Figure 10 is a timing diagram of communications between a wireless charger and a charging apparatus, such as the wireless charger 702 and the charging apparatus 704 of Figure 7, during a first connection. In one mode, subsequent communications can take place during a first connection regardless of whether the charging device is operating in auto-connect mode or in charger-connected mode. Once a connection 914 is established between the wireless charger 702 and the charging apparatus 704, the wireless charger 702 can authenticate the charging apparatus 704 so as to ensure that the charging apparatus 704 is compatible with the charger via a BLE 1002 authentication/encryption/binding procedure. The BLE 1002 authentication/encryption/binding procedure is described in more detail with reference to Figures 11 and 12.
[0078] After authentication, the wireless charger can discover a primary service by transmitting a universally unique identifier (UUID) request 1004. For example, the UUID request 1004 can be used to discover a primary WPCS. Charging apparatus 704 may respond with a UUID 1006 response. Wireless charger 702 may then discover some or all of the characteristics of a service by transmitting a service request 1008. For example, service request 1008 may be used to discover some or all the features of a WPCS. Charging apparatus 704 may respond with a service response 1012.
[0079] Wireless loader 702 can then discover a primary service by transmitting a UUID request 1014. For example, the UUID request 1014 can be used to discover a primary DIS. Charging apparatus 704 may respond with a response of UUID 1016. Wireless charger 702 may then discover some or all of the characteristics of a service by transmitting a service request 1018. For example, service request 1018 may be used to discover some or all of the features of a DIS. Charging apparatus 704 may respond with a service response 1020.
[0080] Note that during the first connection process shown in Figure 10, the wireless charger 712 may continue to transmit power 1010 in order to charge the charging apparatus 704. In some respects, the charging apparatus 704 may be in charger powered mode, and power 1010 would allow charging device 704 to remain active in order to establish a connection with wireless charger 702. Once wireless charger 708 determines that a connection has been terminated and/ or that the charging apparatus 730 does not require the transmitted power of the wireless charger 702, then the wireless charger 702 may interrupt the transmission of energy 1010.
[0081] Figure 11 is a timing diagram of communications between a wireless charger and charging apparatus, such as wireless charger 702 and charging apparatus 6704 of Figure 7. In one embodiment, the following communications may occur when the charging apparatus 704 is operating in auto-on mode. After a connection 914 between the wireless charger 702 and the charging apparatus 704, the wireless charger 702 can authenticate the charging apparatus 704 so as to ensure that the charging apparatus 704 is compatible with the charger using a response protocol. challenge via the BLE transport (via a BLE 1102 authentication/encryption procedure, for example).
[0082] Wireless charger 702 can transmit an unresponsive recording value (WPT authentication) 1104 to charging apparatus 704. In one embodiment, based on the received value, charging apparatus 704 can generate a key value and transmit the key value to the wireless charger 702 via a notification value response (WPT authentication) 1106. In other embodiments, based on the received value, the charger 704 may transmit a stored or embedded key value at the charging apparatus 704 to the wireless charger 702 via a notification value response (WPT authentication) 1106. The key value may include a public key, a private key, a public key certificate, a digital signature, a security token, a unique manufacturer identifier, or the like. If the key value matches the value expected by wireless charger 702, then authentication is complete and the wireless charger has determined that charging device 704 is compatible with it.
[0083] In other respects, wireless charger 702 may engage in one or more communications with charging apparatus 704 so as to ensure that charging apparatus 704 is compatible with charger 702. Wireless charger 702 may transmit one or more authentication messages to the charging apparatus 704. If a response or responses received from the charging apparatus 704 match the responses expected by the wireless charger 702, then authentication is complete and the wireless charger 702 has determined that the apparatus charger 704 is compatible with it. For example, wireless charger 702 may use a combination key to authenticate charging apparatus 704. Wireless charger 702 may transmit a request for a charger technology key value stored in charging apparatus 704. The key value of charger technology stored in the charging device 704 and transmitted by the charging device 704 to the wireless charger 708 may match the value expected by the wireless charger 702 if the charging device 704 is compatible with the wireless charger 702. charging apparatus 704 is compatible, wireless charger 702 can then transmit a request for the manufacturer key value stored in charging apparatus 704. The manufacturer key value stored in charging apparatus 704 is transmitted by charging apparatus 704 to the 702 wireless charger may match the value expected by the 702 wireless charger if the device and charging 704 is manufactured by the manufacturer of charging apparatus 704. In other embodiments, the wireless charger 702 can request both the charger technology key value and the manufacturer key value at about the same time. In this way, a manufacturer is able to restrict the wireless charger 702 to charging only charging apparatus 704 manufactured by the manufacturer and/or charging charging apparatus 704 manufactured by the manufacturer differently from other compatible charging apparatus 704.
[0084] In still other aspects, the wireless charger 702 can authenticate the charging apparatus through one-way communications. Wireless charger 702 may transmit one or more messages and detect whether charging apparatus 704 is compliant based on the behavior or actions of charging apparatus 704. For example, charging apparatus 704 may be compliant and authentication may be completes if charging apparatus 704 temporarily interrupts receiving power from wireless charger 702 based on one or more messages transmitted by wireless charger 702. Likewise charging apparatus 704 can transmit one or more messages without being induced and the wireless charger 702 can determine if the charging device 704 is compatible based on the message or messages received. For example, compatible devices 704 can be configured to transmit a specific message or set of messages within a period of time when it first receives a pulse of energy. If wireless charger 702 receives the specific message or set of messages within the time period, then wireless charger 702 can determine that charging apparatus 704 is compliant and authentication can be complete.
[0085] In one embodiment, if authentication fails, wireless charger 702 may reduce the amount of power transmitted or stop transmitting power to charging apparatus 704. In other embodiments, wireless charger 702 may transmit power to charging apparatus 704 to a low level before authentication takes place. If authentication is successful, then wireless charger 702 can transmit power to charging apparatus 704 at a normal level. If authentication fails, then wireless charger 702 may continue transmitting power to charging apparatus 704 at the low level or may stop transmitting energy to charging apparatus 704.
The wireless charger 702 can then transmit a read characteristic value 1108 to the charging apparatus 704. In mode the recording characteristic value 1108 may include charging parameters. The loading apparatus 704 may respond by transmitting a read response 1112. In one embodiment, the read response 1112 may include loading parameters.
[0087] Wireless charger 702 may then transmit a recording characteristic value 1114 to charging apparatus 704. In one embodiment, recording characteristic value 1114 may include a charging control to instruct charging apparatus 704 transitioning to a state of charge to start charging. Charging apparatus 704 may respond with a recording characteristic value response 1116. In one embodiment, recording characteristic value response 1116 may include a confirmation that charging apparatus 704 will transition to charging state and initiate the shipment.
[0088] During charging, the charging apparatus 704 may periodically transmit a notification value 1118, 1120 and/or 1122 to the wireless charger 702. In one embodiment, the notification values 1118, 1120 and/or 1122 may include a charging report that indicates the current charge level and/or voltage level of the charging device 704. Once the wireless charger 702 determines that the charging device 704 has a sufficient amount of power, the wireless charger 702 may transmit a recording characteristic value 1124. In one embodiment, the recording characteristic value may include a charging control to instruct the charging apparatus 704 to stop charging. Charging apparatus 704 may respond with a recording characteristic value response 1126. In one embodiment, recording characteristic value response 1126 may include a confirmation that charging apparatus 704 will stop charging. Once the wireless charger 702 receives the recording characteristic value response 1126, the connection is terminated 1128.
[0089] Note that during the communications shown in Figure 11, wireless charger 702 may continue to transmit power 1110 in order to charge charging apparatus 704. Once wireless charger 702 determines that a connection has been If terminated 1128 and/or that charging apparatus 704 does not require the transmitted power of wireless charger 702, then wireless charger 702 may stop transmitting power 1110.
[0090] Figure 12 is another timing diagram of communications between a wireless charger and a charging apparatus, such as the wireless charger 702 and the charging apparatus 704 of Figure 7. In one embodiment, the following communications may occur when the charging device 704 is operating in charger powered mode. Once a connection 914 is established between the wireless charger 702 and the charging apparatus 704, the wireless charger 702 can authenticate the charging apparatus 704 so as to ensure that the charging apparatus 704 is compatible with the charger via a BLE 1202 authentication/encryption procedure.
[0091] Wireless charger 702 can transmit an unresponsive recording value (WPT authentication) 1204 to charging apparatus 704. Based on the received value, charging apparatus 704 can generate a key value and transmit the value of key to wireless charger 702 via notification value response (WPT authentication) 1206. If the key value matches the value expected by wireless charger 702, then authentication is complete and wireless charger 702 has determined that the Charging device 704 is compatible with it. If authentication fails, wireless charger 702 may stop transmitting power 1210 to charging apparatus 704.
[0092] Wireless charger 702 may then transmit a read characteristic value 1208 to charging apparatus 704. In one embodiment, read characteristic value 1208 may include charging parameters. Charging apparatus 704 may respond by transmitting a read response 1212. In one embodiment, read response 1212 may include charging parameters.
[0093] Note that, unlike the communications shown in Figure 11, wireless charger 702 may not need to transmit a recording characteristic value 1114 to charging apparatus 704 to instruct charging apparatus 704 to initiate charging . In one embodiment, once the charging apparatus is operating in charger powered mode, it can assume that the charging apparatus 704 is already in the charging state.
[0094] During charging, the charging apparatus 704 may periodically transmit a notification value 1214, 1216 and/or 1218 to the wireless charger 702. In one embodiment, the notification values 1214, 1216 and/or 1218 may include a charging report that indicates the current charge level and/or voltage level of the charging device 704. Once the wireless charger 702 determines that the charging device 704 has sufficient power equipment, the wireless charger 702 may transmit a recording characteristic value 1220. In one embodiment, the recording characteristic value 1220 may include a charging control to instruct the charging apparatus 704 to stop charging. Charging apparatus 704 may respond with a recording characteristic value response 1222. In one embodiment, recording characteristic value response 1222 may include a confirmation that charging apparatus 704 will stop charging. Once the wireless apparatus 702 receives the recording characteristic value response 1222, the connection is terminated 1224.
[0095] Note that during the communications shown in Figure 12, wireless charger 702 may continue to transmit power 1210 in order to charge charging apparatus 704. In some respects, charging apparatus 704 may be in the Charger powered mode, and power 1210 would allow the charging device 704 to remain active in order to establish a connection with the wireless charger 702. Once the wireless charger 702 determines that a connection has been terminated and/or the charging apparatus 704 does not need the transmitted power of wireless charger 702, so wireless charger 702 may stop transmitting power 1210.
[0096] Figure 13 is a flowchart of an exemplary 1300 method for connecting to a charging apparatus via a wireless communications network (a personal area network using a Bluetooth interface, for example). In one embodiment, the steps of flowchart 1300 may be performed by wireless charger 702. Although the method of flowchart 1300 is described herein with reference to a specific order, in various embodiments the blocks presented here may be performed in a different order or omitted , and additional blocks can be added. Those skilled in the art will understand that the method of flowchart 1300 can be implemented in an apparatus that can be configured to charge another apparatus via wireless transfer of power.
[0097] In block 1302, method 1300 transmits a power signal. In one modality, the energy signal is an energy pulse. At block 1304, method 1300 scans for one or more connection requests transmitted by appliances. In one embodiment, method 1300 can detect a load based on the transmitted power signal. Method 1300 can then scan for one or more connection requests transmitted by appliances based on the detected load. At block 1306, method 1300 receives a connection request, via the wireless communications network, from the charging apparatus in response to the transmitted power signal. In block 1308, method 1300 transmits a connection request to establish a connection with the loading apparatus in response to the received connection request. In some embodiments, when method 1300 receives a connection request from the charging apparatus, method 1300 continues to transmit the power signal until a connection is established.
[0098] Figure 14 is a functional block diagram of a wireless charger 1400 according to an exemplary embodiment. Wireless charger 1400 comprises a device 1402, a device 1404, a device 1406, and a device 1408 for the various actions discussed in connection with Figures 1-12. The 1400 wireless charger includes a 1402 device for transmitting a power signal. In one embodiment, device 1402 for transmitting a power signal may be configured to perform one or more of the functions discussed above with respect to block 1302. Wireless charger 1400 also includes device 1404 for scanning for one or more connection requests transmitted by devices. In one embodiment, device 1404 for scanning for one or more connection requests transmitted by appliances may be configured to perform one or more of the functions discussed above with respect to block 1304. Wireless charger 1400 also includes device 1406 to receive a connection request, via the wireless communications network, from the charging apparatus in response to the transmitted power signal. In one embodiment, the device 1406 for receiving a connection request, via the wireless communications network, from the charging apparatus in response to the transmitted power signal may be configured to perform one or more of the functions discussed above with respect to the block. 1306. Wireless charger 1400 also includes a device 1408 for transmitting a connection request so as to establish a connection with the charging apparatus in response to the received connection request. In one embodiment, the device 1408 for transmitting a connection request in order to establish a connection with the charging apparatus in response to the received connection request may be configured to perform one or more of the functions discussed above with respect to block 1308.
[0099] Figure 15 is a flowchart of an exemplary 1500 method for wirelessly connecting to a wireless charger via a wireless communications network (a personal area network using a Bluetooth interface, for example) in one modality , the steps of flowchart 1500 can be performed by loading apparatus 704. Although the method of flowchart 1500 is described herein with reference to a specific order, in various embodiments, blocks presented here may be performed in a different order or omitted, and additional blocks can be added. Those skilled in the art will understand that the method of flowchart 1500 can be implemented on an apparatus that can be configured to be charged by another apparatus via wireless transfer of power.
[0100] At block 1502, method 1500 receives a power signal transmitted by the wireless charger. At block 1504, method 1500 generates a connection request in response to the power signal that is received. At block 1506, method 1500 transmits the connection request over the wireless communications network. At block 1508, method 1500 receives a connection request in order to establish a connection with the wireless charger in response to the transmitted connection request.
[0101] Figure 16 is a functional block diagram of a charging apparatus 1600, according to an exemplary embodiment. Charging apparatus 1600 comprises a device 1602, a device 1604, a device 1606, and a device 1608 for the various actions discussed in connection with Figures 1-12. Charging apparatus 1600 includes a device 1602 for receiving a power signal transmitted by the wireless charger. In one embodiment, device 1602 for receiving a power signal transmitted by the wireless charger may be configured to perform one or more of the functions discussed above with respect to block 1502. Charging apparatus 1600 also includes device 1604 for generating a request connection in response to the received power signal. In one embodiment, device 1604 for generating a connection request in response to the received power signal may be configured to perform one or more of the functions discussed above with respect to block 1504. Charging apparatus 1600 also includes device 1606 for transmitting the connection request through the wireless communications network. In one embodiment, device 1606 for transmitting the connection request over the wireless communications network may be configured to perform one or more of the functions discussed above with respect to block 1506. Charging apparatus 1600 also includes device 1608 for receive a connection request in order to establish a connection with the wireless charger in response to the transmitted connection request. In one embodiment, the device 1608 for receiving a connection request in order to establish a connection with the wireless charger in response to the transmitted connection request may be configured to perform one or more of the functions discussed above with respect to block 1508.
[0102] The various method operations described above can be performed by any suitable device capable of performing the operations, such as various components, circuits and/or hardware and/or software modules. Generally, which operations shown in the figures can be performed by corresponding functional devices capable of performing the operations. The device for transmitting a power signal and the device for transmitting a connection request comprise a transmitter. The device for detecting a charge comprises a charge detector. The device for scanning for one or more connection requests transmitted by devices comprises a device scanner. The device for receiving a connection request comprises a receiver. The device for receiving a power signal and the device for receiving a connection request comprise a receiver. The device for generating a connection request comprises a processor. The device for transmitting the connection request comprises a transmitter.
[0103] Information and signals can be represented using any of several different technologies and techniques. For example, the data, instructions, commands, information, signals, bits, symbols and chips that may be referred to throughout the description above may be represented by voltages, currents, electromagnetic waves, magnetic fields, magnetic fields or particles, fields or particles optics or any combination of them.
[0104] The various illustrative logical algorithm blocks, modules, circuits and steps described in connection with the modalities disclosed herein can be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various components, blocks, modules, circuits, and illustrative steps have been described generically above in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and design limitations imposed on the system as a whole. The described functionality can be implemented in different ways for each specific application, but such implementation decisions should not be interpreted as causing a departure from the scope of the modalities.
[0105] The various illustrative logic blocks, modules and circuits described in connection with the embodiments disclosed herein can be implemented or executed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC) , a Field Programmable Gate Array (FPGA) or other programmable logic apparatus, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor can be a microprocessor, but alternatively the processor can be any conventional processor, controller, microcontroller, or state machine. A processor can also be implemented as a combination of computing devices, such as, for example, a combination of DSP and microprocessor, a series of microprocessors, one or more microprocessors together with a DSP core, or any other such configuration.
[0106] The method or algorithm steps and functions described in connection with the modalities disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. If implemented in software, the functions can be stored or transmitted via one or more instructions or code in a tangible, non-transient, computer-readable medium. A software module can reside in a Random Access memory (RAM), a flash memory, a Read Only Memory (ROM), an Electrically Programmable ROM, (EPROM) an Electrically Erasable Rom (EEPROM), in registers, hard disk , removable disk, CD-ROM or any other form of storage medium known in the art. A storage medium is coupled to the processor so that the processor can read information from and write information to the storage medium. Alternatively, the storage medium can be integral with the processor. Disc (disk and disc) as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disc and blu-ray disc, where discs usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above elements must be included within the reach of computer readable media. The processor and storage medium can reside on an ASIC. The ASIC can reside on a user terminal. Alternatively, the processor and storage medium can reside as discrete components on a user terminal.
[0107] For purposes of summarizing the disclosure, certain aspects, advantages and unprecedented features of the invention have been described herein. It should be understood that all these advantages can be obtained according to any specific embodiment of the invention. Thus, the invention may be embodied or performed in a manner that obtains or optimizes an advantage or group of advantages as taught herein without necessarily obtaining other advantages, or may be taught or suggested herein.
[0108] Various modifications of the embodiments described herein above will be readily apparent, and the general principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but should be given the broadest scope compatible with the unpublished principles and resources disclosed herein.

权利要求:
Claims (11)
[0001]
1. Wireless charger (702) for connecting with a charging device (704) via a wireless communications network, the wireless charger characterized in that it comprises: a wireless power transmitter (710) configured to transmit (1302) an energy pulse for detecting a charging device, the energy pulse configured further to supply power to a sensed charging device such that the charging device remains active so as to establish a connection with the wireless charger; a device scanner configured to scan (1304) for one or more connection requests transmitted by the devices; and a wireless protocol enabled receiver (720) configured to receive (1306) a connection request over the charging device's wireless communications network in response to the transmitted power pulse, a wireless protocol enabled transmitter (720) further configured to transmit (1308) a connection request to establish a connection with the charging device in response to the received connection request, wherein the connection request is transmitted in a communication separate from the transmitted power pulse.
[0002]
2. Wireless charger according to claim 1, characterized in that it further comprises a charge detector configured to detect a charge in a trigger circuit based on the transmitted energy pulse, wherein the device scanner is additionally configured to scan for one or more connection requests based on the load detected on the trigger circuit.
[0003]
3. Wireless charger according to claim 1, characterized in that the connection request comprises charging information associated with a charging service.
[0004]
4. Wireless charger according to claim 3, characterized in that the charging information comprises a target device address and the type of charging service.
[0005]
5. Wireless charger according to claim 1, characterized by the fact that the energy pulse charges the charging device.
[0006]
6. Wireless charger according to claim 5, characterized in that the wireless protocol enabled transmitter is additionally configured to transmit a command to initiate a charging operation on the charging device when the charging device is in a mode self-powered, in which the charging device includes enough power to operate in normal mode while charging.
[0007]
7. Wireless charger according to claim 1, characterized in that the wireless protocol enabled receiver is additionally configured to receive a charging report from the charging device, the charging report comprising a current charging level of the device of loading.
[0008]
8. Wireless charger according to claim 7, characterized by the fact that the wireless protocol enabled transmitter is additionally configured to transmit a charging interrupt command to the charging device based on the received charging report.
[0009]
9. Method for connecting with a charging device (704) via a wireless communications network, the method characterized in that it comprises: transmitting (1302) through a wireless power transmitter (710) a pulse of power, to detect a charging device, the pulse of energy configured to supply power to a charging device such that the charging device remains active so as to establish a connection with the wireless charger (702); scan (1304) for one or more connection requests transmitted by the devices; receiving (1306) via a wireless protocol enabled receiver (720) a connection request over the charging device's wireless communications network in response to the transmitted energy pulse; and transmitting (1308) via a wireless protocol enabled transmitter (720) a connection request to establish a connection with the charging device in response to the received connection request, wherein the connection request is transmitted in a separate communication of the transmitted energy pulse.
[0010]
10. Method according to claim 9, characterized in that it further comprises detecting a load based on the transmitted power pulse, wherein scanning for one or more connection requests comprises scanning for one or more connection requests with based on the detected load.
[0011]
11. Memory, characterized in that it comprises instructions stored therein, the instructions being executed by a computer to carry out the method as defined in claim 9 or 10.

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法律状态:
2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2019-12-10| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

---

2021-05-25| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-07-20| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 26/03/2013, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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